Dance With A Stranger (1985)

Ruth Ellis lives with her 10-year old son Andy next to a night club. One night she meets David Blakely, and they start a love affair. However, for David with his upper-class background it is impossible to uphold the relationship. He leaves her, something which makes her very upset... So, she murdered him. This is a true story about a beautiful woman and single mom becoming the last woman to be hung in Britain.